If it's not what You are looking for type in the equation solver your own equation and let us solve it.
D( C )
12-C = 0
12-C = 0
12-C = 0
12-C = 0 // - 12
-C = -12 // * -1
C = 12
C in (-oo:12) U (12:+oo)
2/10 = C/(12-C) // - C/(12-C)
2/10-(C/(12-C)) = 0
(-1*C)/(12-C)+1/5 = 0
(-1*5*C)/(5*(12-C))+(1*(12-C))/(5*(12-C)) = 0
1*(12-C)-1*5*C = 0
12-6*C = 0
(12-6*C)/(5*(12-C)) = 0
(12-6*C)/(5*(12-C)) = 0 // * 5*(12-C)
12-6*C = 0
12-6*C = 0 // - 12
-6*C = -12 // : -6
C = -12/(-6)
C = 2
C = 2
| 6d*d-5b-6=0 | | 0=12x^2-9x+6 | | Y=x-5/4 | | f/4=12 | | 0.15x+0.4(x-5)=0.01(3x-3) | | 21-2x=53 | | 0=x^2+10x-26 | | 6d*d*d-5d-6=0 | | -4=x+-20 | | x=4.5^3/4 | | 13x^2-3x-10=x | | y=7(x+5)(x-2) | | y=x^2+10x-26 | | (4x-6)(8x+7)=0 | | X-(-5.2)=-12.82 | | 0.065x+5.651=0.050x+5.642 | | 0.7(x+60)+0.7=91 | | 1/6(7t-9) | | 13(x-6)=7x-36 | | 92-(7x+12)=7(x+5)+5 | | 35x^2+18-8= | | -5x+5x+55=12x+8 | | 2x-4.8= | | 3.5+x=48 | | t/5-12=10 | | 4(3x-1)-5=12x-9 | | (9y-8)+9y=6 | | X+0.15x=4669 | | .7x-.2=.6x+3 | | 6x+12y-18z= | | x=9(7/10)-8 | | 18u^2-3u=4 |